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Premises, Equipment and Leases - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment and Lease Commitments [Abstract]      
Depreciation and amortization expense $ 1,500 $ 1,100 $ 939
Finance lease, right-of-use asset 19 20  
Finance lease, liability $ 22 $ 29  
Finance leases, a weighted-average remaining lease term 3 years 10 months 24 days 4 years 1 month 6 days  
Finance lease expense $ 7 $ 10  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other assets Other assets  
Operating Lease, Liability, Statement of Financial Position [Extensible List] Other liabilities Other liabilities  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Premises and equipment, net Premises and equipment, net  
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Other borrowings Other borrowings